Seed relay fetches plain overviews by default

For 2026 a.b.ath articles Eweka's gzip replies have a long tail (p90 12.4 s
per 20k vs 3.9 s plain; 6.1k vs 10.5k headers/s). SEED_NNTP_COMPRESS turns
compression back on; plain replies are deflated for nodes asynchronously.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/services/SeedFetchPool.ts

@@ -31,7 +31,8 @@ class SeedFetchPool {
   }
 
   /**
-   * A failure is retried once without compression, on a connection of its
+   * Pooled connections fetch compressed only with SEED_NNTP_COMPRESS (plain is
+   * faster for recent articles). A failure is retried once without compression, on a connection of its
    * own: either the pooled connection was dead (dropped while idle), or the
    * server stalled mid-reply in compressed mode. Eweka does that for some
    * chunks: it stops after most of the stream and never sends the rest
@@ -105,7 +106,7 @@ class SeedFetchPool {
       if (this.open < this.size) {
         this.open++
         try {
-          return { client: await this.connect(true), usedAt: Date.now() }
+          return { client: await this.connect(indexerConfig.seed.nntpCompress), usedAt: Date.now() }
         } catch (error) {
           this.open--
           this.waiters.shift()?.()